Network Requirements for Video
Running the audio / video service requires the Browser to access the audio / video chat services on the internet over specific ports in order to work.
The audio / video chat service uses the following domains:
The following HTTPS verification servers must be accessible for SSL certificate verification:
In addition to the minimal requirements being met, we also recommend that UDP port 3478 is open. The User Datagram Protocol (UDP) favours low latency over error-correction and is well-suited to audio and video communications.
Port 3478 only accepts inbound traffic after an outbound request is sent. The connection is bidirectional but is always initiated from the corporate network/client so it is not possible for an external entity to send malicious traffic in the opposite direction.
For the best possible experience, we recommend that UDP ports 1025 - 65535 be open.
You can test if a network meets the connectivity requirements by using the OpenTok Connectivity Doctor: http://www.tokbox.com/tools/connectivity/ (you must use Chrome).
- Video: 300 kbps per stream (recommended lowest level)
- Audio: 50 kbps per stream (recommended lowest level)
Server Communication with Opentok